FREDERICK J RAU MD
NPI 1194828137
Obstetrics & Gynecology in Hartford, CT
About Frederick J Rau Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
FREDERICK J RAU MD (NPI 1194828137) is an individual obstetrics & gynecology provider in Hartford, Connecticut, licensed in Connecticut (027438) and active in the NPI registry since September 2006. He is enrolled in Medicare PECOS, maintains a secondary practice location in Hartford, and is a graduate of University Of Connecticut School Of Medicine (1984).
NPPES Registry Identity
Specialties & Licenses
Secondary Practice Location 1
Other Identifiers 1
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Frederick J Rau Md is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Medicare Billing Reassignments
3Medicare enrollment records show Frederick Rau reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Hartford, CT 06102
- Reassigned Medicare billing, Connecticut enrollment
- Also billed through NPI 1770696643 (Connecticut)
- 1,333 clinicians in this Medicare group
Hartford, CT 06106
- Reassigned Medicare billing, Connecticut enrollment
- 601 clinicians in this Medicare group
Rocky Hill, CT 06067
- Reassigned Medicare billing, Connecticut enrollment
- 371 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Areas of Expertise CMS Part B claims 3
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 06106 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Medicare Quality Performance CMS QPP · MIPS
Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.
Reported Quality Measures
Other Providers at the Same Location NPPES 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
HARTFORD, CT 06106
HARTFORD, CT 06106
HARTFORD, CT 06106
HARTFORD, CT 06106
Frequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is Frederick Rau's NPI number?
The NPI number for Frederick Rau is 1194828137. It was assigned to this individual provider in the NPPES registry on September 6, 2006.
Where is Frederick Rau located?
Frederick Rau practices at 100 Retreat Ave Suite 201, Hartford, CT 06106. The listed phone number is (860) 246-8568.
What is Frederick Rau's specialty?
The primary specialty registered for this NPI is Obstetrics & Gynecology with taxonomy code 207V00000X.
Is Frederick Rau enrolled in Medicare?
Yes. Frederick Rau is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
Which organizations bill Medicare for Frederick Rau's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Frederick Rau reassigns Medicare benefits to 3 organizations: Hartford Hospital (Hartford, CT), Connecticut Children's Specialty Group, Inc. (Hartford, CT) and Physicians For Women's Health LLC (Rocky Hill, CT). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Frederick Rau's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Frederick Rau accept?
Health plans from Anthem Blue Cross and Blue Shield list Frederick Rau as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.
When was this NPI record last updated?
The NPPES record for Frederick Rau was last updated on January 26, 2023. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.
# Frederick J Rau, MD · NPI 1194828137
Obstetrics & Gynecology physician in Hartford, Connecticut. Individual provider, active in the CMS NPPES registry since September 6, 2006.
## Identity
- **NPI:** 1194828137 (Entity type: Individual)
- **Enumerated:** September 6, 2006
- **Primary specialty:** Obstetrics & Gynecology · taxonomy 207V00000X
- **State license:** 027438 (Connecticut)
- **Sole proprietor:** No
## Practice location
- **Address:** 100 RETREAT AVE, SUITE 201, Hartford, CT 06106
- **Phone:** (860) 246-8568 · **Fax:** (860) 728-5076
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 3 organizations under Medicare reassignment (form CMS-855R): Hartford Hospital (NPI 1407806391, Hartford, CT); Connecticut Children's Specialty Group, Inc. (NPI 1669448882, Hartford, CT); Physicians For Women's Health LLC (NPI 1801826680, Rocky Hill, CT) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** University Of Connecticut School Of Medicine, class of 1984
## Record status
- **NPPES last updated:** January 26, 2023
- **Other identifiers:** Medicaid 001274381 (CT)
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Source: [NPI Profile](https://npiprofile.com/npi/1194828137) · Data from the CMS NPPES public registry.